Hypodermic syringe



May 7,1929. l. KULIK 1,712,08

HYPODERMIC SYRINGE File'd NOV. 4, 1922 Patented May 7, 1929.

UNITED "STATES PATENT OFFICE.

IRVING KULIK, OF BROOKLYN, NEW YORK, ASSIGNOR T COOK LABORATORIES, INO.,OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

HYPODERMIC SYRINGE.

Application filed November 4, 1922. Serial No. 598,982.

This invention is a hypodermic syringe for use by the medicalprofession. I

Hypodermic syringes generally embody a barrel or cylinder provided atone end with a threaded shank on which the hub of a needle is adapted tobe screwed and in which cylinder the piston is positioned forreciprocation. The stem of the piston extends beyond one end of thebarrel through a stuffing box and is provided cxteriorly thereof with ahandle. The barrel is also provided with a handle which forms apermanent part thereof and these handles are so proportioned that whenthe handle of the piston stem rests in the palm of the hand, two fingersmay be hooked over the handle of" the cylinder to the end thatcontraction or closing of the hand will cause the piston to be advancedfor the purpose of forcing liquid contained in the barrel through thehypodermic needle associated with the opposite end thereof. Everyhypodermic syringe as .purchased on the market is sold with one or Imore wrenches. These wrenches are usually stamped up from relativelyheavy sheet metal, one wrench being of the size to fit the hub of theneedle and operable to attach or remove such hub from the cylinder andthe other wrench being of a size to fit the cap of the stufiing box, sothat said stuffing box may be adjusted to preclude leakage around thepiston stem without having the adjustment so tight as to preclude theeasy operation of such stem. In some instances, as the two wrenchesreferred to are replaced by a single double ended wrench, one end beingof a size to fit the needle and the other end formed to fit the stufiingbox. As these wrenches are small, they soon become lost and in anyevent, it is true in practice that they seldom can be found when wantedand accordingly dentists and the medical profession generally are in thehabit of using forceps, pliers or other expedients to make the necessaryadjustments or to change one needle for another.

The object of the present invention is to so construct the syringe thatit will, of itself, embody means for making the necessaryadjustments'and changing needles so that these operations can be carriedon without the employment of any extraneous means and through theutilization of a component part of the syringe. Said part hithertoserved as a permanent part of the syringe, either as a handle to holdthe barrel-or cylinder or as a handle to propel the piston. \Yit'h thisinvention an additional function is given to these handles. There isobtained by this invention a hitherto lacking feature of a hypodermicsyringe possessing in one of its integral parts appropriate means toadapt adjustable parts. This additional and Very useful feature isattained through novel construction of the handle parts of the syringeand entails neither additional materiol nor appliances.

In carrying out the invention in practice, the syringe is constructedwith the usual cylinder, piston, piston stem and stuiiing box,

the threz'idcd shank for the needle, hub and handles are provided onboth the piston stem and cylinder. However, these handles are soconstructed that either one or both of them constitute a wrench and thewrench handle is detachably associated with the syringe so that when itis desired to adjust the stuffing box or to remove or replace theneedle, the wrencl1like handle may be demounted and employed tofacilitate these operations. The 'advantage of this construction is thatin order to operate the syringe both handles must be associatedtherewith and accordingly a doctor after removing the handle and makingthe necessary adjustments must necessarily replace the handle before hecan operate the syringe and because of this fact the parts must at alltimes, except during adjustment, be associated with one another and arenot therefore apt to become lost.

Furthermore the employment of a part of the syringe as a wrench obviatesthe necessity of the employment of extraneous means for making theadjustments desired and not'only OlJX'ltltGS the tendency to loss butalsominimizes the manufacturing cost.

Features of the invention, other than those specified, will be apparentfrom the hereinat'ter detailed description and claims, when read inconjunction with the accompanying drawings.

The accompanying drawings illustrate one practical embodiment of theinvention, but the construction therein shown, is to be understood asillustrative, only, and not as defining the limits of the invention.

l ig'ure 1 illustrates a hypodermic syringe embodying the presentinvention in side eleshown in central section.

Figure 2 shows the central section of one of the handles removed.

Figure 3 shows a central section of the other handle removed.

Figure 4 illustrates the manner in which the handle illustrated inFigure 3 may be removed with the piston and without detaching the handlefrom the piston.

Figure 5isa plan view of a handle associated with the piston; and,

Figure 6 is a plan View of a handle associated with the cylinder.

Referring to the drawings, 1 is a barrel or cylinder of the syringe, thesame being provided at one end with a threaded shank 2 adapted toreceive the hub of a hypodermic needle. The barrel is' hollow as usualand the piston operates therein. The piston may be of a relatively largesize with a stem of reduced cross section, or as shown in Figure 1, thepiston and stem may l e made in one piece and of constant diameter inthe form of a circular rod 4. A stufiing box is associated with thepiston stem and this stuiiing box embodies an adjusting cap 5 whichthreads into the upper end of the cylinder 1 in the usual manner.

The syringe parts described are well known and form, in themselves, nopart of the present invention, but are simply referredto in order thatthe relationship between these parts and the present invention ma beclearly understood.

ssociated with the barrel 1 is a handle 6, while mounted on the free endof the piston stem 4 is a handle 7. Inthe illustrative showing of thedrawings, both of these handles are detachably mounted on the respectiveparts of the syringe with which they cooperate. Thus thebarrel orcylinder 1 is provided at its upper end with a fixed collar orenlargement'8 and immediately below this collar, the barrel is ofslightly larger diameter than for the remainder of its length and isthreaded as shown at 9. On this threaded portion is adapted to bescrewed the handle 6, said handle .being passed over the needle end ofthe barrel and screwed tightly against the collar 8. The

extending radially therefromand each of these arms is in accordancewith-one form of the present invention cut out as shown at 10 and 11 toconstitute a wrench. I, In practice, the needle hub as well as thestuffing box cap are providmd with hex-1 agonal portions and the art 10is shaped to fit the hexagonal cap of t e stuffing box while the cut outllis shaped to fit the hexagonal hub of the needle. When it is desiredto adjust the stufiing box or remove the needle, the handle 6 may bereadily unscrewed from the part 9 and withdrawn into the position shownin Figure 2 wherein it is free or demounted from the syringe and eitherend of such handle may be employed as a wrench to make the necessaryadjustments. After these adjustments have been made, the handle 6 isreplaced and partakes of the full line position of Figure 1. It thusappears that the handle not only performs its usual' functions, but hasthe further function of providing means to effect the necessary ad-'Figure 5, this wrench being then provided with cut outs l0 and 11similar to the cut outs 10 and 11 of the wrench 6. The handle 7 may inthe. form of the invention shown in the drawings where the piston 4 ismade in the form of a straight rod, be made integral with the rod sothat in employing the handle as a wrench, the rod and handle may bewithdrawn from the barrel 1. However, and if preferred, the upper end ofthe stem 4 may be reduced and threaded as shown at 12 and the wrench 7may be provided with a tapped hole adapted to receive the threaded part12. With this construction, the handle 7 may be screwed free from thepiston or its stem when it is desired to use the handle as a wrench.When so detached it will appear as shown in Figure 3.

It will appear from the foregoing detailed description of the inventionthat the same is simple and highly efficient, is economical tomanufacture and I have found the construction in practice highlyefiicient as a time saver in the making of adjustments, where thewrenches usually emplo ed for this pose could not' be found. 1? asstated,fleither one or both handles may be constructed with one or morewrench openings or cutouts and while I have shown. .115

both handlesias'of wrench form in the drawuram aware t at,

ings, I do not sorestrict the invention which is to be understood as'broadl novel as is commensurate with the appen ed claims.

Having thus fully described the invention, what I claim a'snew and;desire to secure by Letters Patent 7 1 1. A hypodermic syringe embodyinga re onto movable .needlecarriying hub 'screwe the syringe body, saidthe, discharge end 0 jhub being exteriorly polygonal, and said syringeembodying a" removable syringe plunger having a wrench socket engageablewith said hub, by which to screw or unscrew the hub from the syringebody. p

-2. A hypodermic syringe comprising, in

handle of elongated revrrsoly curved SOC- tion mounted on said stoni,one 0nd of said handle being rocossvd to form a wronch 10 adapted toengage said hub.

In testimony whereof I have signed the foregoing specification.

IRVING KULIK.

